PERIDOT - Used to attract wealth, abundance, increase happiness and well being.
SODALITE- Healing of emotions and physical body. An aid to transformation when used in meditation.
TIGER'S-EYE - For protection, for divination and inquiry into past or future lives.
CARNELIAN - To ward off evil thoughts, jealousies, animosities, and psychic attacks toward the individual, inspires bravery and courage.
AMETHYST - The healer from antiquity, healing for the soul, body and mind, it has the universal vibration and enables the holder of the crystal to be connected to it.
HOWLITE - is a stone of awareness. It can prepare the user or wearer to receive wisdom and attunement from the Higher Self and the Divine. It is also used for dimensional travel and healthy meditation.

When you meditate, choose the stone that best fits what you are meditating on. I hold it in my hand, but others simple put it next to a bowl of salt and a candle to help aid them in meditating. I do both :)